Rotor construction.



B. A. BEHEEND. ROTOR CONSTRUCTION. APPLICATION FILED JUNE 25, 1906.

Pafiented; May 11, 1909 i a 1 E A R F 0 I T m N f E M A W! TNES SE3 ATEl T @FPKCE BERNARD A. BEHREND, O1 NORWOOD, OHIO, ASSTGNOR TO ALLlS-OHALMERS COMPANY, A

CORPORATION OF NEW JERSEY, AND THE BULLOCK ELEOTRlG MAN UFAOTURING COM- PANY, A CORPORATION OF OHIO.

ROTOR CONSTRUCTION.

Specification of Batters Patent.

Patented. May 11, 1909.

Application filed June 25, 19128. Serial No. 323,225.

T all whom it may concern:

Be it known that 1, BERNARD A. Rename), a citizen of the United States, residing at Norwood, in the county of Hamilton and State of Ohio, have invented certain new and useful 1m rovements in Rotor Construction, of which t 1e following is a full, clear, and exact specification.

My invention relates to the rotary mem- 1o bers of dynamo-electric machines and parpole ieces are in this case separated by six radial coil slots, there being three coils per pole. In Fig. 1 the end-turns of three of these coils are shown at 16. The ends'of the teeth are irovidod with slots 17 for the recepticularly to the rotary field members of turbo.-

alternators.

One of the ob ects of my invention is to tion of non-magnetic coil retaining wedges. Each pole piece is provided at the end with a ventilai. ing slot 18, extcndingfrom the periphery inward toward the shaft.

At 19 is shown an end cover fo the endturns of the field coils, consisting of a ring or shield surrounding the coils and an inteprovide a rotary member for high s eed machines which is stron compact an consists of few parts all of w rich are well rotect-ed against displacement by centrifuga force,

A further object is to provide an improved core.

and simplified means for supporting, adjust- 3 ing and retaining in position the end-turns of the coils.

A still further object is to provide a solid core construction having air passageways so arranged that there is no danger of an excess 3-? ive rise in temperature.

My invention consists in the details of construction and in the combinations and arrangements of parts described in the s ecii'i- 1. These coil seats or supports are each procation and set forth in the appended c aims.

For a better understanding of my invention, reference is had to the accompanying drawings in whicha rotary 'l'ield member constructed according with parts broken away, and the shaft in secto my invention; Fig. 2 is an end elevation 3 tion; Fig. 3 is an elevation of a portion of the core and shaft and Fig. 4 is a partial end i on the end rin s or cover.

view of the adjustable wedges which support the end-turns of the iield coils.

Referring now to the figures of the drawings, I have shown at 10 a rotary member which is in this case a rotary field member of a turbo-alternator. The core 11 of the rotary member is solid and provided with integral 'shai't projections, one of which is shown at 12. The core and shaft rojec tions are preferably made from a sin lia steel lorging. core are inclined or tapered shown at 13 i'orpurposes to be explained. The core is provided with radial s ots 14 for the reccpnon of field coils and with solid pole pieces 1 1.3, a lot! pole rotor being here shown. The

The shaft projections adjacent the vided with an inclined inner portion 23* which engages the inclined portion of a shaft projection, and with a shorter portion 24 which bears against the coils. When these coil supports are arranged end to end, the spaces between the portions 24 permit a circulation of air as will be explained. The outer ends of the coil seats or supports are notched or cut away to receive an adjusting Figure 1 1s a partial sectional elevation of i nut 25 engaging the threaded portion 26 of the shaft. Thus it is seen that by merely turning the nut 25 the position of the coil seats or en )ports can be changed, thereby adjusting the outward pressure of the coils The inner edge of the inwardly extending portion 21 of the end cover is notched as shown at 27, and engages the radial armsZS of the member 29 on the shaft, the arms being provided with shoulders which engage the notch 27 in the end cover, forming a rabbet oint. The spaces between the arms 28 form openings for air currents, which, when the rotor is in operation, pa inward along the shat-t pro ections, under the endturns of the coils and out through the openings or slots in the ends of the iield poles.

, adjusting At 30 is shown adjusting not for the member 28 and end cover 19, which not engages a MiG/(2190111011 31 of theshait. By

position of the nut 31, meniber 29 and end cover 19 can be moved compact and strong and consists of fewer parts than the previous constructions of similar types of machines. The end-turns of the coils can be ad'usted outwardly against each end cover y means of the wedge-shaped coil seats and adjusting nut 24, and in an axial direction by means of the adjusting nut 30 and end covers 19. When the rotary member is in operation, a large volume of air is drawn through the spaces between the radial arm 28 of the member 29, under the end-turns of the coil between the coil seats, and out through the slots 18 in the ends of the field poles. An excessive rise of temperature is thus prevented.

I do not wish to be confined to the exact details shown as many modifications can be made without departing from the spirit and scope of my invention, and I aim in my clalms to cover all such modifications.

What I claim as new and desire to secure by Letters Patent i:

1. In a rotary field member for dynamoelectric machines, a solid cylindrical. core having shaft projections integral therewith, said core having slots for the reception of field coils, coils in said slots having endturns, end rings surrounding the end-turns, adjustable seats or supports for the endturns resting directl upon the shaft projections and adjusta le outwardly to force the end-turns against the surrounding end rings, and means for adjusting said seats or supports.

2. In a rotary field member for dynamoelectric machines, a solid cylindrical core having integral shaft projections, said core having slots for the reception of field coils, field coils in said slots, end rings surroundin the end-turns of said coils, wed e-shaped coil seats or supports for said coi s resting directly on the shaft projections, and means for ad usting the coil seats or supports to adjust the outward pressure of the coils on the rings.

3. In a rotary member for dynamoelectric machines, a slotted core having integral inclined or tapered portions at the ends thereof, coils in the slots of the core, said coils having end-turns extending beyond the slots of the core, end rings surrounding the end-turns, wedges or blocks having inclined faces resting on said inclined portions and su porting the end-turns, and means for adjusting the wedges or blocks for adjusting the outward pressure of the coils on the end rings.

4. In a rotary member for dynamoelectric machines, a solid slotted core having integral inclined or tapered shaft projections, coils in the slots, wedges or blocks having inclined faces resting on said inclined projections and supporting the coils, and end rings surrounding the end-turns.

5. In a rotary member for dynamo-electric machines, a solid slotted core having integral inclined or tapered shaft projections, coils in the slots, coil seats or supports resting on the inclined or tapered portions, end rings surrounding the end-turns, and means for changing the positions of the coil seats or supports to adjust the pressure of the end-turns on the end rings. 4

6. In a rotary member for dynamo-electric machines, a slotted core and shaft projections all in one integral mass, the pro'ections at the ends of the core being inclined or tapered, coils in the slots of the core, coil supports or seats having inclined faces resting on the inclined portions of the shaft projections, end rings surrounding the end-turns, and means for adjusting the positions of the coil seats or supports to adjust the pressure of the coils on the end rings.

7. In a rotary field member for dynamoelectric machines, acylindrical core body having radial slots for field coils and solid ole leces, the ends of the poles being slotted or t e passage of air.

8. In a rotary field member for dynamoelectric machines, a solid cylindrical core body having slots for the field coils and solid field poles, field coils in the slots of the core, the poles at the ends thereof having slots extendmg from the outer surface to the shaft whereby air can pass axially under the end-turns and outward between the latter and the poles, through said slots.

9. In a rotary field member for dynamoelectric machines, a solid cylindrical core having integral shaft projections, said core havin field poles, and slots for the reception of field coils, coils in said slots, end rings surrounding the end-turns, and seats orsuports for the end-turns of the coils resting irectl on the shaft projections, the ends of the po es being slotted whereby air can pass from an axial direction between the seats or supports and outward through the slots in the core.

10. In a dynamo-electric machine, ac lindrical core having coil slots, field coi s in said slots having end-turns or projections, end covers for the end-turns of the coils, each end cover comprising a ring or shield surrounding the end-turns and an integral plate extending inwardly toward the shaft, and a member on the shaft having radial arms forming a seat for said inwardly extending plate.

11. In a dynamo-electric machine, a cylindrical core having coil slots, field coils in said slots and having end-turns or projections, end covers for the end-turns of the coils, each end cover comprising a ring or shield surroundin the end-turns and engaging the end of t e core, and an integral portion extending inwardly toward the shaft, and a member on said shaft having radial arms engaged by said inwardly extending portion.

12. In a dynamo-electric machine, a cylindrical core h'avin coil slots, field coils in said slots having en -turns or rojections, and covers for the end-turns of the coils, each end cover comprising a ring or shield sur- 13. In a dynamo-electric machine, a cylindrical core having coil slots, field coils in said slots and having end-turns or projections, end covers for the end-turns of the coils, each end cover comprising a ring or shield surrounding the end-turns and engaging the end of the core, and an integral ortion extending inwardly toward the sha t, a member on said shaft having radial arms engaged by said inwardly extending portion, and means for adjusting the position of said member on the shaft for moving the end cover inwardly toward 'the core.

In testimony whereof I affix my signature, in the presence of two witnesses.

BERNARD A. BEHREND.

Witnesses:

LAURA E. WELCH, IiARRIET SUTPHIN. 

